The complete genome of Enterovirus 71 China strain

Five overlapping clones covering the full genome of Enterovirus 71 China strain SHZH98 were obtained and then the sequences were determined by the chain termination method. It showed that the full length of EV71 SHZH98 genome (not including Poly A tail) is 7408 bp. There are some diversities on the lengths and sequences of 5' UTR and 3' UTR between SHZH98 and the other EV71 strains. In P1 capsid region, which is closely associated with viral immunogenicity, EV71 strain SHZH98 shares the highest homology with Taiwan strains; but in P2 and P3 non-structural gene regions there are higher identities with Coxsakievirus A16 and EV71 strains MS, BrCr than with Taiwan strains. Phylogenetic tree constructed by structural gene region indicates that China strain SHZH98 has a closer relationship with Taiwan strains, however, in the non-coding region it has a closer relationship with Coxsakievirus A16, EV71 strains MS and BrCr. EV71 China strain was analyzed at the molecular level. The results will contribute to the     

中国陆块的由来

我国是世界文明古国之一,有着五千多年的悠久历史。从远古时候的黄帝部落,发展到今天约十亿人口的中华民族,其间不知历经了多少波折,闯过了多少险阻。很有意思的是,我们民族世世代代生息的这块土地——中国陆块,它的形成似乎也经历了逐渐扩大的征程,不断的碰撞、不断的并合,使原来各自分离的小块,挤在一起连接成今天的模样。当然,它的历程是漫长的,不是几千年或几万年所能度量得了的,而是一段几亿年的地质历史。     

单核苷酸多态性检测方法的新进展

单核苷酸多态性（single nucleotide polymorphism,SNP）是第三代遗传标记,在基因定位、遗传疾病和人类起源等理论研究中具有重大意义, 在抗药性或药物过敏反应中扮演着极其重要的角色,正逐步成为分子诊断、临床检验、新药研发的重要手段。随着人类基因组测序的完成,SNP分型和发现成为遗传和生命医学领域研究的热点之一。近年来,SNP的检测方法层出不穷,发展很快。文章综述和分析了几种新建立的SNP检测方法,包括基因芯片、分子探针、荧光偏振、荧光共振、质谱和磁性颗粒分析。在生物化学、工程学和分析软件等方面取得突破的基础上,有望建立灵敏准确、简便易行、高通量、低费用的SNP技术。Abstract: Single nucleotide polymorphism (SNP) is the third generation genetic marker. SNP detection now is becoming increasingly important means in molecular diagnostics, clinical assay and novel drug development. It plays an essential role in drug resistance and anaphylactic reaction and has the importamce in theoretical studies of gene location, hereditary diseases and human origin. With the accomplishment of human genome sequencing, the genotyping and discovering of SNP are becoming hot subjects in genetics and biomedicine researches. The methods for SNP detection were renewed rapidly and developed fast in past few years. In this review, several newly established detection methods including gene chip, molecular probe, fluorescence polarization and resonance, mass spectrometry, and bacterial magnetic particle are discussed. It could be expected that an accurate and sensitive, simple and easy-to-handle SNP technology with low cost and high throughput will be available on the basis of research breakthroughs of biochemistry, engineering and analytic software.